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Re: AIX grep limitation: coreutils build failure

From: Paul Eggert
Subject: Re: AIX grep limitation: coreutils build failure
Date: Mon, 29 May 2006 22:53:53 -0700
User-agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux)

Ralf Wildenhues <address@hidden> writes:

> Fine with me, too.

OK, I installed that.

> Please note though that tr is used in
> lib/autotest/general.m4 and lib/autoconf/status.m4 already.

I couldn't find the use of tr in general.m4 -- 'tr' is just a pattern
there, not a command.

The usage in status.m4 should be portable, but it is a bit
out-of-the-way and is problematic anyway, given the comments
describing the problems we've had with it.  Let's remove it.  I
installed the following patch to do that.

> To cope with limited grep, coreutils is still missing the Automake
> patch.  I guess you could also choose to ignore this, as both of these
> failures happen on AIX <= 5.1.

Yes, if it's only no-longer-supported AIX, then it's probably not
worth worrying about.

> We still don't know what that Solaris failure was about, though

Sorry, which Solaris failure was this?  There've been at least three
reported recently.

2006-05-29  Paul Eggert  <address@hidden>

        * lib/autoconf/status.m4 (AC_OUTPUT_MAKE_DEFS): Rewrite to avoid
        the use of 'tr', since this is our only use of 'tr'.

--- lib/autoconf/status.m4      30 May 2006 05:17:17 -0000      1.113
+++ lib/autoconf/status.m4      30 May 2006 05:47:40 -0000      1.114
@@ -1491,37 +1491,35 @@ done # for ac_tag
 # Set the DEFS variable to the -D options determined earlier.
 # This is a subroutine of AC_OUTPUT.
 # It is called inside configure, outside of config.status.
-# Using a here document instead of a string reduces the quoting nightmare.
 [[# Transform confdefs.h into DEFS.
 # Protect against shell expansion while executing Makefile rules.
 # Protect against Makefile macro expansion.
 # If the first sed substitution is executed (which looks for macros that
-# take arguments), then we branch to the quote section.  Otherwise,
+# take arguments), then branch to the quote section.  Otherwise,
 # look for a macro that doesn't take arguments.
-cat >confdef2opt.sed <<\_ACEOF
 t clear
 s/^[    ]*#[    ]*define[       ][      ]*\([^  (][^    (]*([^)]*)\)[   
 t quote
 s/^[    ]*#[    ]*define[       ][      ]*\([^  ][^     ]*\)[   
 t quote
+b any
-s/[     `~#$^&*(){}\\|;'"<>?]/\\&/g
+s/[     `~#$^&*(){}\\|;'\''"<>?]/\\&/g
-# We use echo to avoid assuming a particular line-breaking character.
-# The extra dot is to prevent the shell from consuming trailing
-# line-breaks from the sub-command output.  A line-break within
-# single-quotes doesn't work because, if this script is created in a
-# platform that uses two characters for line-breaks (e.g., DOS), tr
-# would break.
-ac_LF_and_DOT=`echo; echo .`
-DEFS=`sed -n -f confdef2opt.sed confdefs.h | tr "$ac_LF_and_DOT" ' .'`
-rm -f confdef2opt.sed
+       g
+       s/^\n//
+       s/\n/ /g
+       p
+DEFS=`sed -n "$ac_script" confdefs.h`

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